Shock absorber



April 24, 1928. \1,687,039

E. J. KOLODZIEJ SHOCK ABSORBER Filed Feb. 26. 1927 .40 Figure 4 .is a top Patented Apr. 24, 1928.

NiTED STATES EDWARD J. ,KOLOZDZIE-Ti, OF BU'FFALO, NEW YORK.

SHOCK ABSOBBER.

Application led February 26, 1927. Serial No; 171,296.

This invention relates to that class of shock absoi'bers for vehicles in which liquid is employed as the resisting medium for absorbing the shock to which the vehicle is subjected. I

' In shock absorbers of this Character as heretofore constructed it has been customai'y to supply each of a plurality of absorbers individually with resistant liquid both when Originally installed and also when the same required replenishing due to waste and leakage. This is objectionable because of the inconvenience of attending to a plurality of shock absorbers from time to time land also because the absorbers are liable to operate with a pronounced difference in efi'ect if the same are ly supplied with liquid and thereby produce uncomfortable riding.

It is the object Aof vide means whereby all. of sorbers installed on a car are supplied constantly with a full charge of liquid so 'that they operate uniformly and also to efli'ect such supply automatically andfrom a single source, so that less personal attention is' r'equired..

In the accompanying drawings:- Figure 1"is a chassis of an automobile equipped with my invention. Figure 2 is a vertical section of the pump for delivering the resistant liquid to a plurality of hydraulic shock absorbers in accordance With my improvements, the section being ltaken on line 2-2, Fig. 1.

'-Fi ure 3 is a similar view ofthe liquid supp y 'reservoir forming part of my invention.

29 this inventiori tov prolan view, partly in section of .thevliquid de ivery pump, the section being. taken in line 4-4 Fig. ,2.

'In the following description, similar characters of reference indicatelike parts in the several figures of the drawings.

The Chassis of the vehicle or automobile adapted to receive ;my invention may beof .any suitable construction,`that shown in the drawin s consisting of a, -frame having -longitu inal side barslO, 10 and cross bars 11, 11, .front and rear srings 12,13, conz 'nec'd with the front ,an rear parts of the not uniformthe shock ab- I shock absorbers. ported perspective view showingthe,

side bars, and a front)T axle 14 connected with the front Springs.

As usual the engine, as shown'by dotted lines 15 in Fig. 1, is arranged within the front vpart of the frame. l

Between each spring and the adjacent part of the frame is arranged a hydraulic shock absorber which may be of any suitable or approved construction and in the present case each of'the absorbers consists generally of a cylinder 16 containing a movable piston adapted to press against a liquid resistant in the-cylinder, such as oil, glycerine or the like, va rock shaft 17 journaled on the cylinder 16-and operatively connected with the piston thei'ein for moving the latter, a rock arm 18 -connected with the outer end of the rock shaft, and a link 19 connecting the rock arm With the adjacent part of the spring or some part moving therewith.

The means for supplying the .several shock labsoi'bers with 'resistant liquid arel constructed as followsz- The numeral 20, represents a liquid reservoir or tank which is adapted to hold oil or the like for use as a resistant in the This reservoir may be supon any suitable part of the car,.for example on the upper partof the engine, to which it lis connected in thepresentinstan'ce by a bracket 21. This reservoir is provided in its top with a filler opening 22 through which the same may be replenished with resistant liquid after which this opening is closed by a. plug 23. In' its llower end, the reservoir is provided with an outlet 24 which contains a check valve 25 whereby liquid is permitted to fiow out of the reservoir but not backwardly into the same;

Along a suitable part other part of the carwhich moves relative-` ly to the frame is arranged the upright cylinder 26 of a liquid pump which in the present case is secured to one side of the front axle by a clarn 28"engaging the opposite side of theax e and .connecteduwith the pump cylinder by a bolt 29. At its upper end this c linder is provided with an outlet 30 whic is connected by a flexible main conduit 31'and rigid branch conduits 32 with the cylinders of the several shock absorbers and which contains a spring loadof the front axle or ed check valve 27 whereby liquid is per mitted to flow from the upper end of the pump cylinder to the shock absorbers but not m the reverse direction.

a Within this pumpcylinder is arranged a not vice-versa.

10 cylinder while its upper end connects by a flexible tube 37 with the outlet of 'the liquid reservoir. By employing flexible connections between the pump cylinder and piston 'and' the absorberv cylinders and reservoir, the

frame which tappet ispreferably .provided Qnthe piston rod t axle and frame are free to move vertically relatively to each other without breaking any of the parts. -The upward movement of the pum iston in the pump cylinder is pro-l 25 duced byl' zspring 38 interposed between thebottom of'the pump cylinder and the underside of the pump piston. The downward movement of the pump piston is produced by a tappet 39 on one of the cross bars of the on its underside with a rubber bumper 40 adapted to engage an enlarged head 41 on` the upper end pf-the pump iston rod.

Whenever the ta pet pus es downwardly le liquid ass'es from the lower end of the pump cylin er through the pump piston to the upper end of; this cylinder. Whenever the pump. iston is raised by the spring in the pump cy inder liquid is drawn'from the reservoir into the lower end of the pump cylinder, while the li uid in the upper end of this cylinder is de ivered to the cylinders of the several shock absorbers in accordance with their respective requirements. p I

Inasmuch as the discharge of the liquid from the pumpv cylinder is'eflected solely by spring ressure it follows that the z 'amp piston will.p only be moved upwardly in the same measure' as .the liquid'e'nters the shock I .absorbers so that if 'the latter do not take up any additional resisting liquid then'the pump piston will be held in a more or lessj depressed position.

f During the vibration of the a'xle and frame relatively to each other while Vrunning the car, 'the tappet will' only an .extentaequalto that which it`hasY been 'rai'sed by the. pump spring, and if for` a period'no liquid is taken by the absorbers'` from the pump then vthe tappet will vibrate idl'y" without mfluencing the pump, .yet ready at allitimes to work the pump w enever repl'en'- ishmg of the absorbers is required, i i 'x Inasmueh as the pump is connected with posite direction, K

"sa-id reservoir to the .said' pump comprising' a cylinder mounted' depress the piston all of the absorbers the liquid'is su plied uniforml and automatically to all o them in accor ance with their needs without re quiring any attention from the operator other than replenishing the liquid in the reservoir.

I claim as my invention:-- I

1. A plurality of hydraulic shock absorbers mounted on different parts of a vehicle, a liquid reservoir, and a pump which is actuated by relatively movable parts of the ve- .hicle and whereby liquid is delivered from said reservoir to'the several shock'absorbers, said pump comprising a cylinder ada ted to be mounted on one part of the vehic e, a piston arranged in the cylinder, a rod connected with said pist0n,a sprin for moving the piston in one direction, an a tappet on another part of the 'vehicle and adapted to engage said rod and move the piston in the opposite direction.

2. A plurality of hydraulic 'shock absorbers mounted on different parts of a vehicle, a liquid reservoir, and a Ipump which is actuated by relatively mova hicle and' whereby liquid is delivered from said reservoir to the several shock absorbers, said pump comprising a cylinder mounted on one part of vehicle and provided at its, upper end with an outletcommunicating'v with said shock absorbers', a piston arranged insaid cylinder` and having valved 4portsw whereby f liquid ispermitted to pass from the lower end to the upper end of said cylinder but prevented from flowing a tubular rod connected with said-piston and opening into vthe lower end 'of said cylinder and extending with its upper end to the exterior of the cylinder and communicating with said reservoir, a

'check'arranged in the connection -between .said reservoir and said cylinder, a tappet arranged on another part of the lyehicle and adapted to engage said rod for 'depressing said piston, the bottom `of said cylinder and the underside of said piston and Operating to raise the letter.,

`3. A plurality of hydraulic shock absorbers mounted 'on different parts of a vehicle,l a liquid' reservoir, and a pump which is actuand a spring arranged between' lefparts of the ve-` f in the op-4 1 ated .by 'relatively movable parts of-thelve- I hicle ,and whereby liquid is delivered. from several: shock abSOrbcI'S.I

on. onezpart of the "vehicle and provided at lits upper end with an otlet communicating with 'said shock absorber, m said cylinder .and having valved ports whereby liquid is 'permitted to pass from the' lower end to the upper end of-said cylinder but. prevented from flowin in 'the op-v connected posite direction, a tubular r opening -into the lower with said piston and a piston arranged w end of said cylinderl and 'extendingywithqli Lew/,089

its upper:` end to the exterior of the cylunderside of said piston and Operating to inder and communicating with said reserraise the latter, said rod being-provided at 10 voir, a check arranged in the connection its outer end with a head, and said tappet between said reservoir and said cylinder, a being provided with a rubber bumper for 5 tappet arranged on another part of the veengaging said head.

. hicle and adapted to engage said rpd for de- In testimony whereof I hereby afix my pressing said piston, and a spring arranged signature. i w between the bottom of said cylinder and the EDWARD J .KOLODZIEJ 

